INVESTIGADORES
VOJNOV Adrian Alberto
artículos
Título:
Stomata and pathogens Warfare at the gates
Autor/es:
GUSTAVO E. GUDESBLAT; PABLO S. TORRES; ADRIAN A. VOJNOV
Revista:
Plant Signaling & Behavior
Editorial:
Landes Bioscience
Referencias:
Año: 2009 p. 1 - 3
ISSN:
1559-2316
Resumen:
Bacterial and fungal phytopathogens are capable of triggering
stomatal closure through pathogen-associated molecular patterns
(PAMPs), which prevents its penetration through these
pores. Therefore, stomata can be considered as part of the
plant innate immune response. Some pathogens have evolved
mechanisms to evade stomatal defense. The bacterial pathogen
Xanthomonas campestris pv. campestris (Xcc), which infects plants
of the Brassicaceae family mainly through hydatodes, has been
also reported to infect plants through stomata. A recent report
shows that penetration of Xcc in Arabidopsis leaves through
stomata depends on a secreted small molecule whose synthesis
is under control of the rpf/diffusible signal factor (DSF) cell-tocell
signaling system, which also controls genes involved in biofilm
formation and pathogenesis. The same reports shows that
Arabidopsis ROS- and PAMP-activated MAP kinase 3 (MPK3) is
essential for stomatal innate response. Other recent and past
findings about modulation of stomatal behaviour by pathogens
are also discussed. In all, these findings support the idea that
PAMP-triggered stomatal closure might be a more effective
and widespread barrier against phytopathogens than previously
thought, which has in turn led to the evolution in pathogens of
several mechanisms to evade stomatal defense.